The primary JOB of any responsible government is to protect it's citzens. That job involves excluding countries and cultures that are detrimental to the protection of the native citizens from entering the realm. That's what borders, armies and the monopoly on violence granted to the government are for. If the government will not take on that responsibility by supporting "multiculturalism", then the citizens will either have to fend for themselves - or elect a new government that *will* protect them.
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